1 Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, Chungbuk 28116, South Korea; College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 28644, South Korea.
2 Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, Chungbuk 28116, South Korea.
3 College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 28644, South Korea.
4 Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Cheongju, Chungbuk 28116, South Korea. Electronic address: mokim@kribb.re.kr.